ptfe filter vents for venting technologies












Our Experience

Over 34 years in using PTFE venting systems in a commercial environment producing plants to sell into the marketplace. UK and international customers around the world.

Laboratory production at TQPL a company involved in producing contract flasking for nurseries worldwide. Production of novel new plants.

Laboratory Supply business with worldwide customers.

Experience in laboratory production since early days of commercialisation of 1970's in world leading orchid nursery in UK. Collaboration with UK pioneers of plant tissue culture.

Work and experience in UK, Australia and Europe. Commercial and University Departmental Research with latest bio-technologies and government environmental compliance

Headed and set up one of UK's largest in-vitro tissue culture laboratories that went on to produce over 15 million plants per year in early 1980's in Suffolk.

Inventor and innovator of a number of unique horticultural products in the marketplace.

Collaboration with seed companies in production of plants.

Supplier of venting products for medical, scientific and engineering applications for over 34 years.




































































Venting information and FAQ


PTFE venting FAQ and information resource for Ptfefiltevents.


Q. Why should I vent my aseptic cultures?

  • By increasing the air exchanges increased plant growth rates can be achieved in raising plants in-vitro

  • Reduce or eliminate vitrification / glassiness / Hyperhydracity.

  • Remove or vent dangerous ethylene gas and stop the problem of phenolic products

  • Improved in-vitro environment to produce vigorous growth and better establishment of plants out of culture. Eliminate establishment losses.

  • Reduce dehydration with good air exchanges.

Q. Why should I use hydrophobic PTFE?

  • Microfibril enmeshment in hydrophobic PTFE is superior to many other methods for contamination free venting.

  • Particle are filtered out and trapped between the many fibrils of the PTFE. One of the most efficient means of achieving good air flow with total particle entrapment across many industries.

  • Hydrophobic PTFE stops dehydration of cultures as moisture loss is less than non-hydrophobic vents.

  • Non PTFE systems rely on simple particle blockage without the benefits of enmeshment and high air filter efficiencies

Q. What is PTFE?

  • It is the chemical abbreviation for polytetrafluroethylene a highly versatile polymer and in this instance manufactured specifically for aseptic venting.

Q. What is the pore size of the PTFE used in Adhesive Microfiltration Discs?

  • The pore size and PTFE structure is sufficiently small enough to stop the passage of all mites, dust, pollen, fungi, yeast, bacteria and other microbiological contamination agents.

  • No contamination particles will pass through our filters.

  • They are efficient enough to be used for medical grade and biological filtration systems

Q. Can I compare the pore size with other filter systems?

  • The unique PTFE structure of the Adhesive Microfiltration Discs (AMD) ensures filtration efficiency is not simply a factor of pore size. For this reason the pore size is not critical but the overall filter efficiency is.

  • We do not reveal the pore size of our filters as it is commercially sensitive information.

Q. Where can I find a supplier of Membrane Filters to vent my cultures?

  • Our PTFE filters allow efficient Membrane Filtration of air or gas keeping valuable cultures aseptic and engineering products safely filtered.

  • We supply customers worldwide by air mail post or carrier.

  • We supply direct and do not use third parties. This saves on costs to our customers

Q. Why choose AMD from PTFEFILTERVENTS and TQPL.

  • We have been using multilayered PTFE venting for over 2O years in our own plant laboratory and supplying a whole range of customers in different industries.

  • Our AMD are made exclusive for us, to our specifications at TQPL.

  • The new strong AMD has a very tough outer polymer layer which give unrivalled protection to the PTFE membrane. Protecting it from abrasion and damage should it occur. The AMD is so tough it cannot be ripped!

  • They are not available elsewhere. Our products are superior and we will supply at small numbers according to customer needs at competitive prices.

Q. Why is hydrophobicity important in the AMD ?

  • The level of hydrophobicity is critical in achieving venting between the internal flask environment of high relative humidity (95-100%) and the external air. AMD allow high air exchange and low levels of moisture passage helping control dehydration of cultures and media.

  • Hydrophobicity has been controlled at manufacture to strict specifications and indeed provides a level of humidity / airflow control other venting systems do not provide.

Q. Will moisture ingress through the filters?

  • Generally AMD venting does not allow inward passage of moisture from environmental dampness, humidity or water splashes.

  • However as they are only filters they cannot remove moisture from humid air. They simply will work in both humid or dry environments.

Q. Can I use PTFE venting to eliminate contamination due to mites?

  • Mite infestation of cultures can be stopped and eliminated by the use of our PTFE AMD venting systems.

  • Mites cannot pass through the PTFE while the adhesive ring provides a strong mite proof barrier. The AMD has an especially strong and wide layer of 'mite proof' adhesive. To totally eliminate the problem all non-venting points of entry for mites should be stopped

Q. Can I obtain technical information about the use of AMD ?

  • We supply technical information with orders and can be contacted with specific questions about our products. We will always try and help based on our many years of experience in PTFE venting

  • When placing orders, indicate your usage and we will supply information sheets to help with either aseptic technologies or engineering applications.

Q. Are all PTFE venting systems the same?

  • No, this is very apparent as soon as you examine, compare or use our AMD. The AMD's are uniquely laminated with a strong polymer and toughened PTFE to withstand the rigors of commercial laboratory use.

  • We consider many other products to be inferior to our own which were manufactured according to our in-vitro requirements.

  • Our new strong AMD introduced in 2012 is a tough new breakthrough in venting for a range of industries.

Q. Are the AMD's patented worldwide?

  • The manufacturing process is commercially confidential. The PTFE is also subject to secret manufacturing treatments to improve filtering efficiencies and produce a better filter. Not all PTFE is the same and trials were needed to establish the correct venting characteristics of our AMD.